I am new and trying to quit meth and am trying to see what kind of supports there are out there

I have been using meth for nearly twenty years and have managed to live otherwise pretty healthy. I don't lead the typical meth lifestyle and I eat and sleep and get lots of exercise. I even have a job where I help out other addicts. I am very isolated though and have no friends anymore and am very alone which I think makes it more difficult when trying to quit. I really want to try though because I don't want to have to go away to rehab or something. I would like to think that I can do it on my own. I am just seeing what kind of resources and supports there are out there and hopefullyconnect with some others that are going through similar stuff as me. I am just not feeling overly confident right now. I appreciate any advice i can find about quitting.